Ind a clear thesis topic related to the Effects of Child Labor

Hi,
Im studying MPPA ( Master of public policy )I want a clear and specific topic thesis related to the Effects of Child Labor .

In fact, In my document a thesis about the Effects of Child Labor. But my professor comment was The topic is too broad for the thesis. You should also make the public policy component stronger. Will you look at the effectiveness of a specific law or policy?

please write One pages about the topic ? and Brief Description of Study.